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A New Plesiosaur from the Kansas 
Comanche Cretaceous. 
BY Sy) Wie WILLIS PON, 
Plesiosaurus Gouldii n. sp, 
Several nearly complete dorsal vertebre from the Comanche 
shales of Clark county, Kansas, represent a hitherto undescribed 
species of a Plesiosaurid, differing very distinctly from P. Mudgii 
Cragin in its much larger size and the shape of the centrum. It 
is probable that the cervical vertebra described and figured by 
me in this journal, vol. ili, p. 2, belongs with the same ora 
closely allied species. 
The dorsal vertebrw are markedly characterized by the peculiarly 
cordate form of the centrum, The anterior face is rather deeply 
concave, for this part of the column; clearly cordate in outline, 
with a small emargination above. The anterior zygapophyses are 
spout-like, the notch between them not extending further than the 
middle of the articular surfaces. The spine is short and small. 
The transverse processes are compressed, springing in part from 
the centrum, in part from the base of the pedicles. The body is 
compressed in the middle, forming an obtusely rounded surface 
below. About midway on the sides, below the lower root of the 
transverse process, the side is pinched in, with a small vascular 
foramen at the bottom of the depression. 
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= oe ee eS 
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PRPANGE OLVan tenon SYLAPOMUVSeSs.) Vain uy enin is MoO 
(57) KAN, UNIV QUAR, VOL, VIL, JAN. 1807, SERTDS A. 
